A Determination Method for Optimal Parameters of Rock Slope with Double Slip Surfaces

Abstract

The invention discloses a measuring method of a double slip surface rock mass slope anchorage optimization parameter. The method comprises the steps of firstly determining spatial geometric elements and physical and mechanical properties of a slope through scene investigation, adopting a stereographic projection method to determine the unstable rock mass structure slope and a normal inclined angle between an anchor rod and a structural surface intersecting line of the slope, obtaining the IO inclined angle between the slope optimal anchor rod and the structural surface intersecting line by conducting derivation on a slope stability coefficient, and correspondingly determining optimal anchorage force and an anchorage force correction coefficient on the condition of common construction. According to the measuring method of the double slip surface rock mass slope anchorage optimization parameter, on the basis of stereographic polar projection, a limit equilibrium method is adopted to analyze a slip law of a wedge-shaped body, and an anchor bolt support method applicable for the wedge-shaped double slip surface rock mass slope is explored; thereby, the stability of the rock mass slope under the influence of various slip tendencies is strengthened, and the effectiveness and practicability of the method are shown.

Description

technical field [0001] The invention belongs to the field of rock mass slope stability reinforcement and prevention, and in particular relates to a method for measuring the anchoring optimization parameters of rock mass slopes with double slip planes. Background technique [0002] As one of the serious geological disasters in my country, landslides are extremely harmful and destructive, bringing huge economic and property losses to our country, and posing a serious threat to construction projects and people's lives. Among them, rock landslide is a common landslide geological disaster with great harm, especially when the rock mass slope has obvious structural plane, the landslide body is very easy to slide along the structural plane to form a landslide. Therefore, it has very important scientific significance and engineering application value in the field of landslide disaster reduction and prevention to take corresponding prevention and control measures for rock mass slopes ...

AI Technical Summary

Problems solved by technology

However, at present, the mechanical action mechanism of prestressed anchors on wedge slopes is still relatively vague, and the exact mechanical relationship between wedges and anchors cannot be accurately determined, and there is no systematic method to determine the type of slippage of wedges. The direction of movement, the inclination angle of the anchor, the magnitude of the anti-sliding force provided by the anchor, the position of the anchor, etc., more importantly, so far there is no clear method to determine the spatial angle of the two structural planes on the wedge body. Influenced by the stability of slip surface slopes, there is no uniform standard for the standard design of bolt support for rock slopes with double slip surfaces

Therefore, the existing methods cannot accurately optimize the bolt support scheme and parameters of the double-slip rock slope.

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